#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
    int x[3];
    int y[3];
    for (int i=0;i<3;i++) {
        cin >> x[i] >> y[i];
    }
    for (int i=0;i<3;i++) {
        swap(x[0], x[i]);
        swap(y[0], y[i]);
        int dx1 = x[1] - x[0];
        int dy1 = y[1] - y[0];
        int dx2 = x[2] - x[0];
        int dy2 = y[2] - y[0];
        if (dx1*dx2+dy1*dy2==0 && dx1*dx1+dy1*dy1==dx2*dx2+dy2*dy2) {
            cout << x[0]+dx1+dx2 << ' ' << y[0]+dy1+dy2 << endl;
            return 0;
        }
    }
    puts("-1");
    return 0;
}